Immunodeficiency is a condition where the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. It can be congenital (primary) or acquired (secondary).
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Primary immunodeficiencies are often genetic and present at birth.
Secondary immunodeficiencies are acquired due to factors such as infections like HIV, malnutrition, or medical treatments like chemotherapy.
Common variable immunodeficiency (CVID) is the most frequently diagnosed primary immunodeficiency in adults.
Immunodeficiency can lead to recurrent, severe, or unusual infections.
Diagnosis often involves blood tests to measure levels of immune cells and antibodies.
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Related terms
Autoimmunity: A condition where the immune system attacks the body's own tissues.